Error in sampler$call_sampler(args_list[[i]]) : c++ exception (unknown reason)

Summary:

model <- brm(formula = Y ~ X, data = dfTemq, seed = 123)
Compiling Stan program...
Start sampling

SAMPLING FOR MODEL 'anon_model' NOW (CHAIN 1).
Chain 1:
Chain 1: Gradient evaluation took 2.7e-05 seconds
Chain 1: 1000 transitions using 10 leapfrog steps per transition would take 0.27 seconds.
Chain 1: Adjust your expectations accordingly!
Chain 1:
Chain 1:
[1] "Error in sampler$call_sampler(args_list[[i]]) : "
[2] " c++ exception (unknown reason)"
error occurred during calling the sampler; sampling not done

Description:

See above

Reproducible Steps:

See above. I am on

R version 4.1.1 (2021-08-10) -- "Kick Things"
Copyright (C) 2021 The R Foundation for Statistical Computing
Platform: x86_64-apple-darwin20.4.0 (64-bit)

System Version:	macOS 11.5.1 (20G80)
Kernel Version:	Darwin 20.6.0

Current Output:

See above

Expected Output:

> model <- brm(formula = Y ~ X, data = dfTemq, seed = 123)
Compiling Stan program...
Start sampling

RStan Version:

> packageVersion("rstan")
[1] ‘2.26.3’

R Version:

> R.version.string
[1] "R version 4.1.1 (2021-08-10)"

Operating System:

macOS 11.5.1

Begin with the reported brm(formula = Y ~ X, data = dfTemq, seed = 123) call and the sampler$call_sampler(args_list[[i]]) failure. Reproduce it on the stated R 4.1.1, RStan 2.26.3, and macOS 11.5.1 environment, then trace the sampler failure until its cause is identified. Done means sampling completes or the issue has a documented, reproducible diagnosis.